What Causes Drowsiness At Work? Fatigue, drowsiness, and nodding are common problems many office workers have. Always tired, nodding, and sluggishness at work will heal your mood, health and efficiency of work. There are three main reasons why workplace people feel sleepy during working hours: Not Sleeping Well, Not Enough Sleep Today, many young people often surf the … [Read more...] about Unexpected Causes Make you Drowsy During Working Hours